Thread for 12/14 potential dusting, arctic air, and 12/17 potential slop

[das]

Temp is up to 28.9F here in Clarksburg.  No drip, drip, dripping yet.  Storm totals were 0.4" of SN/IP and 0.1" ice accretion.

Jeb would be proud of my shoveling, I believe...

[mappy]

32 finally. Slow dripping occurring, about .2" ice onto top of the sleet/snow we got

[Yeoman]

What makes people go out and drive in this?

[Kmlwx]

Just now, Yeoman said:

What makes people go out and drive in this?

I mean to be fair - a tanker truck probably didn't have a choice. Gas deliveries have to happen whether it's icy or not. 

[Yeoman]

4 minutes ago, Kmlwx said:

I mean to be fair - a tanker truck probably didn't have a choice. Gas deliveries have to happen whether it's icy or not. 

55 cars involved

[Kmlwx]

4 minutes ago, Yeoman said:

55 cars involved

Yeah just saw that updated number. Chain reaction at its worst. 

[RDM]

Just hit 32 for first time since Wed.  The overcast lighted up considerably in the last few mins.  The warm up begins.

Too bad about the accident in Baltimore.  But that tanker truck was driving at an insane speed for the conditions.  Sad...

[WVclimo]

Still socked in at noon.  31 degrees.  Clouds and spotty freezing drizzle.

[87storms]

Took my jeep out earlier...not the interstate.  Was slick, but not terrible.  The typical areas (sidewalks, side streets, etc.) were worse.  Main streets were more slush than a rink...at least in Bethesda.  Could have been worse if more prolonged.  Was concerned my power would go out, but luckily that didn't happen.

[wxdude64]

Just crept above 32 at 32.5 degrees, decks and such still frozen, but treated roads appear in decent shape around here per cameras. Only 0.03 this am and probably about the same since 7 am reading. Truly sad what happened with the tanker wreck.

MUCH warmer to my south, Blacksburg has soared to 53 in last hour!

[Amped]

1 hour ago, gymengineer said:

What's no-contest is the GFS vs. NAM for rising above freezing times. Pretty much every freezing rain event we can think of in the past few years has seen the NAM picking up on the surface wedge better than the GFS.

Thats the one thing the NAM is good for. Just a matter of resolution.

 

59 minutes ago, Yeoman said:

What makes people go out and drive in this?

That was insane!!!!! Glad I stayed off the roads.

[high risk]

15 minutes ago, Amped said:

Thats the one thing the NAM is good for. Just a matter of resolution.

 

      it's really not an issue of resolution.    That does help (4km NAM was better than the parent 12 km NAM, although resolution isn't the only factor), but the parent NAM and GFS are run at basically the same resolution (12 vs 13 km), and the NAM kept in the sfc cold air way better than the GFS did.

[Sparky]

I won't be leaving the driveway anytime soon.

[mattie g]

Heading out to grab a bag of ice for my party.

[MN Transplant]

33.9.  Did a good scraping of the first car to get to the store.  After coming back the second scraping was like a hot knife through butter.  In and out of sun.  Looks nice out there.

[WxMan1]

26 minutes ago, high risk said:

      it's really not an issue of resolution.    That does help (4km NAM was better than the parent 12 km NAM, although resolution isn't the only factor), but the parent NAM and GFS are run at basically the same resolution (12 vs 13 km), and the NAM kept in the sfc cold air way better than the GFS did.

We keep talking about horizontal resolution, but vertical resolution is just as important. The fact that the tops of my tall trees could be seen swaying in the wind, while the surface layer was still with a temp stuck at 32°F tells you how incredibly shallow the CAD can get. If models cannot resolve this degree of vertical resolution/near-ground stratification of temperature, then they'll likely mix down the waa too quickly. 

[Stormpc]

For us folks that live on the south side of the Potomac it was pretty much a non-event. Sure there was sleet and ice but the amounts were paltry compared to areas in Maryland. I got .05 in rain/sleet. Just not much to fuss about. In fact my street is dry my sidewalks are dry and there's only a little remaining moisture in the grass. Most of the models nailed the placement. The thump New York City got was supposed to be ours five days ago.

[wxdude64]

Up to 35.4 degrees, dripping and we are done for the event, least wintery/ice-wise.

 

[HighStakes]

Temps still stuck around 32.

 

[BristowWx]

13 minutes ago, Stormpc said:

For us folks that live on the south side of the Potomac it was pretty much a non-event. Sure there was sleet and ice but the amounts were paltry compared to areas in Maryland. I got .05 in rain/sleet. Just not much to fuss about. In fact my street is dry my sidewalks are dry and there's only a little remaining moisture in the grass. Most of the models nailed the placement. The thump New York City got was supposed to be ours five days ago.

I thought it was ok.  My neighborhood was pure ice until 11 and both me and the dog slipped on the stoop.  Car was a block of ice.  Not bad but maybe I just dumbed down my expectations.  It was a ice diversion from model watching.

[Amped]

In hindsight this was actually a  decent ZR setup.   Surface had been well below freezing for over 24hrs and was in the upper 20s with low dewpoints when the precip started.  Any liquid that fell on the roads was instantly going to turn to black ice. Would have been a lot worse if this had occurred during a rush hour or travel day.

 

[mappy]

33 now. Drip drip drip. York road is clear, 83 is too. My driveway is a slushy icy mess. Hoping PA has their highways clear, leaving at 4 to head to Dutch Wonderland 

[H2O]

Up to 40 with sun. Cars are dry

[WVclimo]

Finally hit 32.0 but not really seeing any melting yet.  Surprised by the reports of sunshine.  It's been a thick overcast all day here.

[smokeybandit]

1 hour ago, mappy said:

33 now. Drip drip drip. York road is clear, 83 is too. My driveway is a slushy icy mess. Hoping PA has their highways clear, leaving at 4 to head to Dutch Wonderland 

Looks generally fine.

 

http://www.511pa.com/

[mappy]

Thanks!

[North Balti Zen]

Cold really hung on a long time - still only 34 in Towson. 

[Fozz]

Only about 33 or so. Still looks very frosty outside.

[das]

 33.9°F at 5pm after a high of 34.3°F today in Clarksburg. Untreated roads are still sleet and ice covered and the ground is still frozen solid underneath the "snowcover".

[mappy]

Back down to 32 at home. Sucks since things will refreeze. Thought it was supposed to warm up?


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